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Issue 43, 2016
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Highly active nickel–cobalt/nanocarbon thin films as efficient water splitting electrodes

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Abstract

Developing low cost, highly active and stable electrocatalysts for both the hydrogen evolution reaction (HER) and the oxygen evolution reaction (OER) using the same electrolyte has remained a major challenge. Herein, we report a novel and robust material comprised of nickel–cobalt nanoparticles coated on a porous nitrogen-doped carbon (NC) thin film synthesized via a two-step pulsed laser deposition technique. The optimized sample (Ni0.5Co0.5/NC) achieved the lowest overpotentials of 176 mV and 300 mV at a current density of 10 mA cm−2 for HER and OER, respectively. The optimized OER activity might be attributed to the available metal oxide nanoparticles with an effective electronic structure configuration and enhanced mass/charge transport capability. At the same time, the porous nitrogen doped carbon incorporated with cobalt and nickel species can serve as an excellent HER catalyst. As a result, the newly developed electrocatalysts manifest high current densities and strong electrochemical stability in overall water splitting, outperforming most of the previously reported non-precious metal-based catalysts.

Graphical abstract: Highly active nickel–cobalt/nanocarbon thin films as efficient water splitting electrodes

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Publication details

The article was received on 02 Sep 2016, accepted on 03 Oct 2016 and first published on 05 Oct 2016


Article type: Paper
DOI: 10.1039/C6NR06961D
Citation: Nanoscale, 2016,8, 18507-18515
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    Highly active nickel–cobalt/nanocarbon thin films as efficient water splitting electrodes

    B. Bayatsarmadi, Y. Zheng, V. Russo, L. Ge, C. S. Casari and S. Qiao, Nanoscale, 2016, 8, 18507
    DOI: 10.1039/C6NR06961D

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